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3 years ago

Some months have 30 days, some months have 31 days; how many have 28?

Mathematics

2 answers:

erastovalidia [21]3 years ago

7 0

All of the months have 28 days. Although some may have more then 28 days they always have AT LEAST 28 days

Hope this helped!

~Just a girl in love with Shawn Mendes

Over [174]3 years ago

6 0

Only February has 28 days

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2 years ago

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2 years ago

If ABCD is a parallelogram find the value of unknow size

Keith_Richards [23]

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Hey, there!!

As it is a parallelogram, remember basic properties of parallelogram,

Their opposite sides are parallel and equal to eachother.
Their opposite angles are equal.
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b = (7×10)°

Therefore, b= 70°.

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3 years ago

The line plots show the number of hours two different age groups of teenagers spent online the previous week.

nikklg [1K]

The range of the top plot, hours spent by 13-15 year olds, is found by subtracting the highest value, 34, and the lowest value, 21. 34-21=13.
The mean of the top plot is found by adding together all of the data points and dividing by 10 (the number of data points):
$\frac{21+24+26+27+27+28+28+28+31+34}{10}=\frac{274}{10}=27.4$

The range of the bottom plot, minutes spent online by 16-18 year olds, is found by subtracting the highest value, 36, and the lowest value, 12. 36-12=24.
The mean of the bottom plot is found by adding together all of the data points and dividing by 11 (the number of data points):
$\frac{12+21+27+28+28+28+28+30.5+34+35+36}{11}=\frac{307.5}{11} \approx27.95$

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3 years ago